Feed mechanism for heading-machines.



G. T. BRENNAN.

FEED MECHANISM FOR HEADING MACHINES. APPLICATION FILED JAN. 30, 1914.

1 .1 1 3,406 Patented Oct. 13, 1914.

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G. T. BRENNAN.

FEED MECHANISM FOR HEADING MACHINES.

APPLIGATION FILED JAN. 30, 1914 Patented Oct. 13, 1914.

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THE NORRIS PETERS CO" PHOTO-LITHO.. WASHINGTON, D C

APPLICATION FILED JAN. 30. 1914.

Patented Oct. 13, 1914.

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c. T. BRENNAN.

FEED MECHANISM FOR HEADING MACHINES.

AYPLICATION FILED JAN. 30, 1914;

1,1 1 3,406. Patented Oct. 13, 1914.

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C. T. BRENNAN. FEED MECHANISM FOR HEA'DING MACHINES.

APPLICATION TILED JAN. 30, 1914.

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UNITED STATES PATENT OFFICE.

CHARLES 'r. BRENNAN, or wn rnnnuar, CONNECTICUT, ASSIGNOR TO THE E. J.MAN VILLE MACHINE ooMrANY, or WATERBURY, CONNECTICUT, A CORPORATION orCONNECTICUT.

FEED MECHANISM FOR HEADING-MAGHINES.

Specification of Letters Patent.

Patented 0015.13, 1914.

Application filed January 30, 1914. Serial No. 815,380.

I Feed Mechanism for Heading-Machines, of

rotatory movement by means of a ratchet and pawl mechanism which isactuated from the crank shaft which reciprocates the punch carryinggate. As the crank makes two revolutions during each cycle of themachine, for the purpose of giving two blows to the stock after eachfeed, the ratchet and pawl mechanism is rendered inoperative every otherrevolution of the crank shaft by means of properly designed connectionsfrom a cam. This drive is satisfactory where the stock is ofconsiderable length, but with short lengths of stock, such for instanceas bolt blanks eke, even with a plural number of pawls that successivelyengage the ratchet teeth, as the teeth to be of suflicient strength mustbe of considerable size and be of definite length, the adjustment cannotbe made fine enough to give a sufficiently accurate feed, and as aresult the bolt heads are frequently imperfectly formed, the dies aredamaged and other parts of the machine injured.

The object of this invention is to provide a mechanism which can beadjusted so as to feed the stock surely and accurately the exactrequired distance to efiect the result sought, whereby a multiple numberof short lengths of rod or wire of considerable size can be fed into thedies of a double-stroke open-die cold bolt-heading machine and besubjected to the desired operations without danger of damaging the diesor injury to other parts of the machine.

Only so much of a heading .machine is shown in the accompanyingdrawings, as is necessary to illustrateithe feed mechanism whichembodies this invention. 7

Figure l showsa face view of the feed mechanism. Fig.2 shows a sideelevation ofthe same.

on Fig. 4:. Fig. a is a view looking at the face of the parts shown inFig. 3, the clutch members being engaged. Fig. 5 shows a section througha portion ofthe clutch drum and one of the clutch blocks, on the planeindicated by the dotted line 5-5 on Fig. 4, the parts being engaged.Fig. 6 is a View similar to that shown in Fig. 4 with the clutch membersdisengaged. Fig. 7 is asectime through the clutch drum and one of theclutch blocks on the plane indicated by the dotted line 77 on Fig. 6,the parts being disengaged. Fig. 8 is a section on the plane indicatedby the dotted line 8-8 on Fig. 2.

The feed roll shaft 1 has keyed or otherwise fastened toit the gear 2for driving the other feed roll shaft, alsothe drum 3 Which forms onemember of the ratchet friction clutch which is employed to impart thefeeding motion to the feed roll shafts. This druinin the interior of itsperipheral wall Fig. 3 is a vertical sectionon the plane indicated bythe dotted line 33 may have threads 4 for increasing the fricthe drum.Turning loosely on the hub 6 is a ring 7, between which and thesegmentalblocks aretoggle links 8. When the ring 7 i i is turned one way thetoggle links are straightened so as to force the blocks with great forceoutward against the wall of the drum and cause the drum and the partsconnected with it to be given a rotary movement. (Fig. 4). When the ringis turned in the other direction, the toggle links are moved so as towithdraw the blocks and cause them to release their hold on the drum.(Fig. 6). Between the clutch blocks are angular pieces 9 which projectfromthe inner face of the ring 10 for the purpose of guiding the clutchblocks in their movement in and out. The toggle ring 7 forms part of abox 11, beingfastened by screws or other means to the back thereof, andthe box being freeto oscillate'on the end of the roll shaft. Theswinging of this box in one direction turns the ring '7 so as tostraighten the toggle links and cause the chuck blocks to bite the wallsof the drum and by this frictional engagement of the clutch parts toimpart rotatory movement to the feed roll shaft. The swinging of the boxin the opposite direction turns the ring 7 and loosens the toggle linksso that the blocks immediately release their hold.

A spring 12 (Fig. '1) which connects a pin 13 on the upper end of thebox with a pin 141- on the ring 10, normally holds the ring 10 and theguide blocks which are attached to it in such position that the clutchblocks move out and in for clutching and releasing the members. The boxis 08- cillated by the bar 15 which is adapted to be connected with thegate crank shaft of the machine, and as stated, is reciprocated therebytwice during each cycle of the machine. The end of the bar 15 is hingedto a block 16 that is adapted to move up and down in an opening in thebox. Movement in and out can be imparted to this block by a screw 17which is provided with a worm wheel 18 thatmeshes with a worm 19 on thespindle 20 that is supported by the box and that on the outside has ahand wheel 21. By turning this hand wheel, through the worm, wormwheel-and screw, the distance between the axis of the box and the pointof pivotal connection of the end of the bar 15 with the box can be veryfinely adjusted at any time, even when the machine is in motion. Thisenables the parts to be adjusted at any time so as to give a veryaccurate feed.

As stated, the bar 15 gives the box two oscillations to each cycle ofthe machine, and as but one feed is required for each cycle it isnecessary that every other oscillation of the box be renderedineffective, that is, on every other oscillation the blocks must fail toengage with the drum. To accomplish this the ring--10 which carries theguide blocks 9 is periodically turned around against the tension of thespring'12 so as to locate the blocks 5 in such positions that when thetoggle links are straightened by the ring 7 they will not straightensufliciently far to force the blocks into contact with the wall of thedrum. These positions are shown in Fig. 6. To effect this a rocker 22 ismounted on a stud projecting from the upper end of the box. The foot 23of this rocker is adapted to engage with a roll 24 on a stud projectingfrom the ring 10 which carries the guide blocks, and move the ring tothe right. The other end of the rocker has a roll 25 that is held on theupper surface of the arm 26 by a spring 27 that is coiled about its hub.This arm is fastened to a shaft 28 which has a rocker arm 29 that isconnected with a bar 30. This bar is adapted to be reciprocated by asuitably formed cam so that during every alternate oscillation of thebox the arm 26 is lifted. hen this arm is lifted the rocker 22 is turnedinto engagement with the roll 24 on the ring 10 and during thatoscillation of the box this holds the ring 10 with the guide blocks sothat the friction blocks cannot be moved out far enough to engage withthe walls of the drum. In order that the machine may be run withoutcausing the feed mechanism to operate, the rocker 22 is arranged so thatit may be thrown way over to a position where it will hold the roll 24and guide ring 10, as shown in Fig. 6. When the rocker holds the partsin this manner the machine can be run without causing the feed rolls tofeed stock.

The mechanism illustrated and described can be adjusted whether themachine'is run- ;ning or is inoperative, so closely that the stock willbe fed very accurately. This enables the machine to operate on veryshort pieces of stock, so short in fact that a number of pieces areheldin the dies at all times, and yet these pieces can be fed withoutthe provision of a stop or gage for determining the exact amount offeed. The feed is quick and positive for the feed motion is given bymechanism which makes two revolutions to each cycle of the machine, andyet the feed is given to the stock only once during each cycle of themachine. The distance of the feed is not dependent upon the fixedlengths of ratchet teeth. Ratchet teeth if made fine have not sufficientstrength and break off during the operation of machines for which thismechanism is provided, and even if relatively small the feed must be afixed distance, either the length of a ratchet tooth or a multiple ofthat length. lVith the mechanism shown the friction is so great and thegrip is so powerful and quick in operation that the frictional form ofratchet clutch shown will operate successfully for short feeds even withlarge stock.

The invention claimed is:

1. A feed mechanism for a heading machine consisting of a drum with aninterior friction wall, friction blocks movable radially andcircumferentlally in said drum,

an oscillatory box, links connecting said box and the friction blocksfor moving the latter radially, guide blocks arranged between the endsof the friction blocks, and means for changing the circumferentialpositions of the guide blocks and friction blocks with relation to theoscillatory box.

2. A. feed mechanism for a heading machine consisting of a shaft, a drumattached to the shaft, a box mounted on the shaft, means for oscillatingthe box, a ring attached to the box, blocks movable radially in thedrum, and toggle links between the ring and the blocks and adapted whenthe ring moves inone direction to force the blocks outward, and when thering moves in the opposite direction to allow the blocks to move inward.

3. A feed mechanism for a heading machine consisting of a shaft, a drumfixed on the shaft, a box loose on the shaft, means for oscillating thebox, a ring attached to the box, friction blocks movable radially in thedrum, toggle links between the ring and the blocks, and guiding blocksbetween the ends of the friction blocks.

4. A feed mechanism for a heading machine consisting of a shaft, a drumfixed on the shaft, a box loose on the shaft, means for oscillating thebox, a ring attached'to the box, friction blocks movable radially in thedrum, toggle links between the ring and the blocks, guide blocks betweenthe ends of the friction blocks, and means for moving the guide blocksand causing them to shift the friction blocks into and out of operativepositions.

5. A feed mechanism for a heading machine consisting of a shaft, a drumfixed to the shaft, a box loose on the shaft, means for oscillating thebox, a ring attached to the box, friction blocks movable in the drum,toggle links between the ring and the friction blocks, and means forshifting the friction blocks into and out of operative positions.

6. A feed mechanism for a heading machine consisting of a shaft, a drumfixed to the shaft, a box loose on the shaft, means for oscillating thebox, friction blocks movable inthe drum, toggle links connected with thebox for moving the friction blocks in and out, and means for varying theannular relations of the box and the blocks whereby the friction blocksmay periodically be rendered inoperative.

7. A feed mechanism for a heading ma chine having a shaft, a drum fixedto the shaft, a box loose on the shaft, means for oscillating the box,friction blocks located in the drum, toggle links connected between thebox and the friction blocks, guide blocks between the ends of thefriction blocks, a ring connecting said guide blocks, and means forchanging the annular positions of the said ring and guide blocks.

8. A feed mechanism for a heading machine having a shaft, a drum fixedto the shaft, a box loose on the shaft, means for oscillating the box, aring attached to the box, friction blocks within the drum, toggle linksbetween the ring and the friction blocks, guide blocks between the endsof the friction blocks, a ring connecting the guide blocks, means forholding the ring and the guide blocks in normal position, a rockercarried by the box and adapted to move the ring and guide blocks intoabnormal position, and an oscillatory arm for controlling the travel ofsaid rocker.

9. A feed for a heading machine consisting of a shaft, a drum fixed tothe. shaft, a box loose on the shaft, friction blocks within thedrum,means arranged between the box and the friction blocks for moving thelatter inward and outward, means for oscillating said box, a movableconnection between said means and said box, a screwand gearing foradjusting said connecting means in or out from the axis of said box, anda hand wheel for turning said gearing.

10. A feed mechanism for a heading machine consisting of an oscillatorymember,

means for oscillating said member, a rotatory member, friction blocksmovable radially into and out of operative engagement with said rotatorymember by the movements of the oscillatory member, and means forrendering the friction blocks inoperative.

CHARLES T. BRENNAN Witnesses:

HARRY R. WILLIAMS, ADoLPH C. KAISER.

Copies of this patent may be obtained'for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

